Cookie Converter
Convert cookies between different formats
Input
Format:
Output:
What this tool does
Converts between Netscape (cookies.txt) format and JSON, pretty-prints cookie strings, and displays individual cookie attributes (Path, Domain, Expires, Secure, HttpOnly, SameSite). Fully client-side.
Who it's for: Developers debugging cross-domain cookie issues, QA engineers inspecting browser state, and scraper authors handling cookie jars.
When to use
- •Convert an exported cookies.txt file to JSON for use in a Node scraper.
- •Inspect a Cookie request header for missing attributes.
- •Debug why a cookie isn't being sent across subdomains.
- •Extract cookies from a browser extension export.
How it works
- 1Paste a cookie string or cookies.txt content.
- 2Tool detects format and converts.
- 3Each cookie is broken down by attribute.
- 4All parsing happens in your browser.
Tips
- •SameSite=None requires Secure - otherwise modern browsers reject the cookie.
- •Cookies without a Domain attribute default to the origin (no subdomains).
- •HttpOnly cookies are not readable from JavaScript - useful for session tokens.